Passage One
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As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile changeable thing depending to a large extent on the relationship of the color to other colores seen simultaneously. It is not fixed in its relation to the direct stimulus which creates it. On the other hand, the properties of surfaces that give rise to color do not seem to change greatly under a wide variety of illumination colors, usually (but not always) looking much the same in artificial light as in daylight. Both of these effects seem to the due in large part to the mechanism of color adaptation mentioned earlier. When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This A. the eye’s adaptation to color B. the properties of colored surfaces C. the effect of changes in color intensity D. experiments on colored objects [多项选择]PART ONE
[填空题] Letter One
Jan. 25, 2007 Dear Mr. Guan Li, From your advertisements we know that you are making transformers (变压器) in a variety of types. We are interested in your products. Would you please send us the details of your products If possible, please send us some pictures of the products. Looking forward to your early reply. Yours sincerely, Louis Smith Letter Two Feb. 14, 2007 Dear Mr. Louis Smith, It’s our pleasure to submit the attached quotation (报价) for your review and consideration. Here enclosed are some pictures of our latest types of transformers. This quotation package consists of the following: Section 1 Price list for transformers Section 2 Types of transformers Section 3 Technical [填空题]Article One
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